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CVE-2021-4002

Public on 2022-01-06
Modified on 2022-02-04
Description

A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.

Severity
Medium
See what this means
CVSS v3 Base Score
5.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2023-02-17 00:02 ALAS-2023-1688
Amazon Linux 1 kernel 2022-02-04 23:24 ALAS-2022-1563
Amazon Linux 2 - Core kernel 2021-12-08 02:23 ALAS2-2021-1727
Amazon Linux 2 - Core kernel 2025-01-30 22:56 ALAS2-2025-2752
Amazon Linux 2 - Kernel-5.10 Extra kernel 2024-02-01 20:10 ALAS2KERNEL-5.10-2024-049
Amazon Linux 2 - Kernel-5.10 Extra kernel 2022-01-21 00:04 ALAS2KERNEL-5.10-2022-008
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-01-20 19:13 ALAS2KERNEL-5.4-2022-010
Amazon Linux 2 - Kernel-5.4 Extra kernel 2025-01-31 05:43 ALAS2KERNEL-5.4-2025-093
Amazon Linux 2 - Livepatch Extra kernel-livepatch-4.14.246-187.474 2021-12-02 19:13 ALAS2LIVEPATCH-2021-072
Amazon Linux 2 - Livepatch Extra kernel-livepatch-4.14.248-189.473 2021-12-02 19:13 ALAS2LIVEPATCH-2021-071
Amazon Linux 2 - Livepatch Extra kernel-livepatch-4.14.252-195.481 2021-12-02 19:13 ALAS2LIVEPATCH-2021-070
Amazon Linux 2 - Livepatch Extra kernel-livepatch-4.14.252-195.483 2021-12-02 19:12 ALAS2LIVEPATCH-2021-069

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD CVSSv2 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N
NVD CVSSv3 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N